最近发现一个炫酷的玩意，用python作图，可以用在django ，flask等框架里，使用非常方便。赶紧记录下来，分享一下，不过目前还没有中文文档，只有英文版本，需要自己耐心看。。。。
pygal provides various kinds of charts:
Line
Basic
Stacked
Time
Bar
Basic
Stacked
Horizontal
Histogram
Basic
XY
Basic
Scatter Plot
Dates
Pie
Basic
Multi-series pie
Donut
Half pie
Radar
Basic
Box
Extremes (default)
1.5 interquartile range
Tukey
Standard deviation
Population standard deviation
Dot
Basic
Negative
Funnel
Basic
Gauge
Basic
Pyramid
Basic
Treemap
Basic
Maps
World map
French map
Swiss map
